The glue from these sticks go on purple but dry clear to make them easy to use. The glue stick applies smoothly with a disappearing purple formula, making it perfect for kids just learning how to glue. These glue sticks provide easy bonding without the mess. The glue works on a variety of paper types including foam board, computer paper and cardboard. The smooth, easy-to-use formula dries fast, clear, and colorless with a strong bond that lasts. Ideal for use at home or in the office.